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If you have a multi-threaded client which share 1 connection to the broker it is possible you may have seen errors like: 

2007-12-05 14:14:52,606 [VMTransport] ERROR - org.apache.activemq.broker.TransportConnection.Service - Async error occurred: java.lang.IllegalStateException: Cannot lookup a connection that had not been registered: ID:bubba-38184-1196882086290-2:1
java.lang.IllegalStateException: Cannot lookup a connection that had not been registered: ID:bubba-38184-1196882086290-2:1
at org.apache.activemq.broker.SingleTransportConnectionStateRegister.lookupConnectionState(SingleTransportConnectionStateRegister.java:113)
at org.apache.activemq.broker.TransportConnection.lookupConnectionState(TransportConnection.java:1313)
at org.apache.activemq.broker.TransportConnection.processRemoveConsumer(TransportConnection.java:538)
at org.apache.activemq.command.RemoveInfo.visit(RemoveInfo.java:64)
at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:281)
at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:178)
at org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:100)
at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:67)
at org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:202)
at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:118)
at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:42)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)


root cause is that the client side has multiple threads calling close() on consumer/session and the connection objects. If the timing of those concurrent calls was just right, it is possible for the client to send the connection close message followed by a session or consumer close message which is invalid and would result in IllegalStateException reported by the broker.

- Simplified the ActiveMQConnection and TransportConnection shutdown so that this does does not happen.


git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@602529 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Hiram R. Chirino 2007-12-08 18:56:11 +00:00
parent 8c541377bd
commit 2984963912
2 changed files with 93 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
activemq-core/src/main/java/org/apache/activemq/ActiveMQConnection.java
View File

@ -580,8 +580,8 @@ public class ActiveMQConnection implements Connection, TopicConnection, QueueCon
// If we announced ourselfs to the broker.. Try to let
// the broker
// know that the connection is being shutdown.
syncSendPacket(info.createRemoveCommand(), closeTimeout);
asyncSendPacket(new ShutdownInfo());
doSyncSendPacket(info.createRemoveCommand(), closeTimeout);
doAsyncSendPacket(new ShutdownInfo());
}
ServiceSupport.dispose(this.transport);
@ -1144,17 +1144,20 @@ public class ActiveMQConnection implements Connection, TopicConnection, QueueCon
* @throws JMSException
*/
public void asyncSendPacket(Command command) throws JMSException {
if (isClosed()) {
if (isClosed() || closing.get()) {
throw new ConnectionClosedException();
} else {
doAsyncSendPacket(command);
}
}
private void doAsyncSendPacket(Command command) throws JMSException {
try {
this.transport.oneway(command);
} catch (IOException e) {
throw JMSExceptionSupport.create(e);
}
}
}
/**
* Send a packet through a Connection - for internal use only
@ -1193,10 +1196,15 @@ public class ActiveMQConnection implements Connection, TopicConnection, QueueCon
* @throws JMSException
*/
public Response syncSendPacket(Command command, int timeout) throws JMSException {
if (isClosed()) {
if (isClosed() || closing.get()) {
throw new ConnectionClosedException();
} else {
return doSyncSendPacket(command, timeout);
}
}
private Response doSyncSendPacket(Command command, int timeout)
throws JMSException {
try {
Response response = (Response)this.transport.request(command, timeout);
if (response != null && response.isException()) {
@ -1212,7 +1220,6 @@ public class ActiveMQConnection implements Connection, TopicConnection, QueueCon
throw JMSExceptionSupport.create(e);
}
}
}
/**
* @return statistics for this Connection

43
activemq-core/src/main/java/org/apache/activemq/broker/TransportConnection.java
View File

@ -139,7 +139,6 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
private long timeStamp;
private final AtomicBoolean stopped = new AtomicBoolean(false);
private final AtomicBoolean transportDisposed = new AtomicBoolean();
private final AtomicBoolean disposed = new AtomicBoolean(false);
private CountDownLatch stopLatch = new CountDownLatch(1);
private final AtomicBoolean asyncException = new AtomicBoolean(false);
private final Map<ProducerId, ProducerBrokerExchange> producerExchanges = new HashMap<ProducerId, ProducerBrokerExchange>();
@ -198,7 +197,7 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
}
public void serviceTransportException(IOException e) {
if (!disposed.get()) {
if (!stopped.get()) {
transportException.set(e);
if (TRANSPORTLOG.isDebugEnabled()) {
TRANSPORTLOG.debug("Transport failed: " + e, e);
@ -240,7 +239,7 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
// Handle the case where the broker is stopped
// But the client is still connected.
if (!disposed.get()) {
if (!stopped.get()) {
if (SERVICELOG.isDebugEnabled()) {
SERVICELOG
.debug("Broker has been stopped. Notifying client and closing his connection.");
@ -260,7 +259,7 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
// notification gets to him.
ServiceSupport.dispose(this);
}
} else if (!disposed.get() && !inServiceException) {
} else if (!stopped.get() && !inServiceException) {
inServiceException = true;
try {
SERVICELOG.error("Async error occurred: " + e, e);
@ -669,11 +668,12 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
return null;
}
public Response processRemoveConnection(ConnectionId id) {
public Response processRemoveConnection(ConnectionId id) throws InterruptedException {
TransportConnectionState cs = lookupConnectionState(id);
// Don't allow things to be added to the connection state while we are
// shutting down.
cs.shutdown();
// Cascade the connection stop to the sessions.
for (Iterator iter = cs.getSessionIds().iterator(); iter.hasNext();) {
SessionId sessionId = (SessionId)iter.next();
@ -731,7 +731,7 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
}
public void dispatchAsync(Command message) {
if (!disposed.get()) {
if (!stopped.get()) {
getStatistics().getEnqueues().increment();
if (taskRunner == null) {
dispatchSync(message);
@ -759,7 +759,7 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
final MessageDispatch messageDispatch = (MessageDispatch)(command.isMessageDispatch()
? command : null);
try {
if (!disposed.get()) {
if (!stopped.get()) {
if (messageDispatch != null) {
broker.preProcessDispatch(messageDispatch);
}
@ -779,7 +779,7 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
public boolean iterate() {
try {
if (disposed.get()) {
if (stopped.get()) {
if (dispatchStopped.compareAndSet(false, true)) {
if (transportException.get() == null) {
try {
@ -901,7 +901,6 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
} catch (Exception ignore) {
LOG.trace("Exception caught stopping", ignore);
}
if (disposed.compareAndSet(false, true)) {
// Let all the connection contexts know we are shutting down
// so that in progress operations can notice and unblock.
@ -914,16 +913,21 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
taskRunner.wakeup();
// Give it a change to stop gracefully.
dispatchStoppedLatch.await(5, TimeUnit.SECONDS);
disposeTransport();
taskRunner.shutdown();
} else {
disposeTransport();
}
try {
transport.stop();
LOG.debug("Stopped connection: " + transport.getRemoteAddress());
} catch (Exception e) {
LOG.debug("Could not stop transport: " + e, e);
}
if (taskRunner != null) {
taskRunner.shutdown();
}
active = false;
// Run the MessageDispatch callbacks so that message references get
// cleaned up.
for (Iterator<Command> iter = dispatchQueue.iterator(); iter.hasNext();) {
@ -959,7 +963,6 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
}
LOG.debug("Connection Stopped: " + getRemoteAddress());
}
}
/**
* @return Returns the blockedCandidate.
@ -1233,18 +1236,6 @@ public class TransportConnection implements Service, Connection, Task, CommandVi
}
}
protected void disposeTransport() {
if (transportDisposed.compareAndSet(false, true)) {
try {
transport.stop();
active = false;
LOG.debug("Stopped connection: " + transport.getRemoteAddress());
} catch (Exception e) {
LOG.debug("Could not stop transport: " + e, e);
}
}
}
public int getProtocolVersion() {
return protocolVersion.get();
}